const mongoose = require('mongoose');
const Cate = require('../model/cate.model');

//增
exports.create = function(req,res,next){
    const cate = new Cate(req.body);
    cate.save().then(data => {
        res.json(data);
    });
}

//删

exports.remove = function(req,res,next){
    var id = req.params.id,
        ids = [];

    Cate.findOne({_id:id},function(err,doc){
        if(doc){
            ids = [doc._id];
            doc.getChildren(function(err,docs){
                var len = docs.length;
                for(var i=0;i<len;i++){
                    ids.push(docs[i]._id);
                }
                Cate.remove({_id:{$in:ids}}).then(data => {
                    res.json({'message':'已删除'});
                });
            })
        }
    })
}


//改
exports.update = function(req,res,next){
    const id = req.params.id;
    Cate.findByIdAndUpdate(id,{$set:req.body},{new:false}).then(data => {
        res.json(data);
    });
}



//查

function reverseTree(data,pid){
    var result = [],
        temp,
        data = JSON.parse(JSON.stringify(data));
    for(var i in data){
        if(data[i].parentId === pid){
            result.push(data[i]);
            temp = reverseTree(data,data[i]._id);
            if(temp.length > 0){
                data[i].children = temp;
            }
        }
    }
    return result;
}

exports.list = function(req,res,next){
    var type = req.params.type;
    Cate.find({type:type},function(err,data){
        var rpTree = reverseTree(data,null);
        res.json(rpTree);
    });
}